题目内容

No sooner （） than they started to repair the sludge pump.

A. the second engineer had got into the engine room
B. the second engineer got into the engine room
C. has the second engineer got into the engine room
D. did the second engineer get into the engine room

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A. 只焊一道
B. 只焊两道
C. 只焊三道
D. 只焊四道

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A. 1Ω
B. 2Ω
C. 7&Omega